Centering-pin-adjusting mechanism for type-machines.



, M. C. INDAHL. GENTERING PIN ADJUSTING MECHANISM FOR TYPE MACHINES.

APPLICATION FILED 11113.12, 1914.

1,1 17,494. Patented Nov. 17. 1914.

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MAURITZ C. INIDAHL, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO LANS'ION MONOTYPE MACHINE COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPO- RATION 0F VIRGINIA.

GENTERING-PIN-ADJ'USTING MECHANISM FOR TYPE-MACHINES.

Specification of Letters Patent.

Patented Nov. 17, 1914.

Application filed March 12, 1914. Serial No. 824,284.

T 0 all whom it may concern:

Be it known that I, MAURITZ C. INDAHL, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Centering-Pin-Adjusting Mechanism for Type-Machines; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification, and to the figures and letters of reference IIlEll'kQCl thereon.

This invention relates to improvements in the centering pin adjusting mechanism of Patent No. 989,556, dated April 18, 1911, and has for its objects to simplify and render less obstructive the pressure devices for the radially yielding pins, and to adapt the adjusting devices for index setting.

In the mechanism of the patent referred to the spring for advancing the angi'ilarly disposed pressure pins was attached at one end to the frame or bridge and at the other to a lever fulcrumed upon a second lever, each of said levers engaging one of the pressure pins, and the adjusting screws opposing the pressure pins were disposed at right angle so that in effecting the lateral adjustments of the centering pin it was necessary to approach the adjusting screws from dif- According to the present invention the attachment of the spring to the frame or bridge is dispensed with by interposing said spring under compression directly between levers fulcrumed on the bridge and the adjusting screws for the right angle adjustments are arranged parallel and provided with indexing means so that both adjust- Inents can be made from the same side and an indexed setting performed without the necessity for trial adjustments.

In the accompanying drawings illustrating a preferred form of embodiment of the invention: Figure 1 is a top plan view and Fig. 2 a side elevation of the centering pin head or bridge of a type casting machine with the improvements shown applied thereto. Fig. 3 is a detail sectional view showing the means for transmitting the motion of one of the adjusting screws.

The same numerals designate like parts in the several views.

The frame or bridge 1, centering pin bearing or hub 2 and radial pins 3, at of the prior structure are retained, but the lever 5, engaging pin 3, as well as lever (5, engaging pin 1, are each pivotally attached to the under side of the top plate with their power ends overlapping and provided with bear ings 7 for the retention of a relatively short interposed spring 8, thereby obviating the necessity for an attaching means on the bridge and rendering the mechanism more compact and less obstructive to the associated mechanism of the machine.

Supported to slide in a bearing in axial alinemcnt with pin 3 but on the opposite side of the hub is a pin 9 provided with a threaded extension 10 engaged by a screw 11, the latter threaded internally and externally to run on extension 10 and in its bearing in the bridge. Pin 9 is held against rotation by the engagement of the point of a screw 12 in a groove 13 runninglongitudinally of said pin. The external and internal threads of screw 11 differ slightly in pitch and the displacement of pin 9 effected at each revolution of said screw 11 is proportional to the difference in said pitches.

A second screw 14, in all respects similar to screw 11, is arranged parallel with and in close proximity to the latter in position to engage the threaded shank of pin 15, the latter abutting against one arm of a bell crank lever 16 secured in a recess on the under side of the top plate of the bridge and pivotally attached to the latter, the other arm of said lever engaging one end of a pin 17 supported in alinement with pin 4 and engaging the opposite side of the hub. Each of the adjusting screws 11, 14, is furnished with an indexing head 18 provided with spaced circumferential grooves or projections adapted to cooperate with a yielding pointer and retaining member 20. Preferably these retaining members are formed with hollow shanks telescoping one within another and embracing a compression spring 21, the connected members being secured in a transverse opening formed in a part 22 of the bridge projecting between indexing heads 18, as shown.

The lateral adjustments of the centering pin which this mechanism is designed to effect are extremely delicate, being measured in fractions of a thousandth of an inch, and in practice the parts are so arranged and proportioned that each indexed division of heads 18 efiects a displacement of 0.0002 inch and in a direction at right angles one to the other so that the final positioning of the centering pin axis is represented by means of th two motions.

By thus bringing the two adjustment controlling members in such juxtaposition that both can be controlled and the effect observed from one and the same point of ap proach, the operation of effecting adjustment is greatly facilitated. Moreover, the indexing of the adjusting devices enables chartered adjustments to be performed with facility and despatch.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is,

1. A centering pin adjusting mechanism for type casting machines such as described provided with a bridge, laterally movable hub, yielding radial pins and opposing adjusting devices, and in combination there with an actuating lever for each yielding radial pin pivoted upon the bridge with their power ends overlapping, and a spring interposed between and seated on said levers.

2. In a centering pin adjusting mechanism for type casting machines such as described, the combination with the bridge, the laterally movable centering pin hub, the yielding pins disposed at an angle to each other and engaging the periphery of the hub, an adjustable pin in alinement with each yielding pin and engaging the opposite side of the hub, of independent adjusting devices located. in proximity on the bridge and each coupled with one of said adjusting pins.

3. An adjusting mechanism for the cen tering pin of a type casting machine such as described, the same including, in combination, the following elements, towit, a supporting frame or bridge; a centering pin hearing or hub arranged for lateral adjustment on the bridge; two radially movable spring actuated pins engaging the periphery of the hub at different points on the circumference thereof; a non-rotating pin engaging the hub at a point diametrically opposite one of said yielding pins and engaged by an adjusting screw threaded onto the stem of said pin and into the bridge; a pin engaging the hub at a point opposite the remaining yielding pin; and actuating devices for said last named pin including a bell crank lever mounted on the bridge, one arm whereof engages the pin and the other is engaged by a non-rotating pin upon whose shank is threaded an adjusting screw, the latter threaded in the bridge.

4:. In an adjusting mechanism for the centering pin of a type casting machine such as described, including a bridge, a laterally movable hub, and two yielding pins engaging the periphery of the hub at points approximately 90" apart, and in combination therewith, two adjusting devices for the hub each diametrically opposing one of said yielding pins, said adjusting devices including two indexed screws threaded into the bridge and disposed in parallel relation with their indexed heads in proximity, one of said screws being threaded upon the shank of a non-rotating pin opposing one of said yielding pins, and the other of said screws threaded on the stem of a non-rotating pin, the latter engaging one arm of a bell crank lever supported on the bridge, with its other arm engaging a longitudinally movable pin contacting with the hub in opposition to the other of said yielding pins.

5. In an adjusting mechanism for the cenzering pin of a type casting machine such as described, equipped with a frame or bridge, a centering pin guiding hub mounted and laterally adjustable upon said bridge, angularly disposed yielding radial pins engaging the periphery of the hub, and opposed adjustable pins, and in combination therewith, means for effecting adjustment of said ad justable pins from the same side of the bridge, the same including two screws threaded into the bridge in parallel relation and each provided with a notched actuating head, and retaining member, one for each head, located in a bearing between the heads and projected therefrom by an interposed spring.

6. An adjusting mechanism for the centering pin of a type casting machine such as described, equipped with a supporting frame or bridge, a laterally adjustable centering pin guide or hub, two yielding pins movable on intersecting lines and engaging the periphery of the hub, two adjusting pins each alined with one of the yielding pins and enthe opposite side of the hub, and in combination therewith, indexed adjusting devices arranged in proximity on the same side of the bridge and comprising two screws in parallel relation threaded into the bridge and each provided with a circumferentially notched. head, a double ended detent with interposed spring located within a bearing intermediate the screw heads with each end engaging one of said heads, ach screw threaded upon the shank of a longitudinally movable pin, whereof one of said pins engages the hub and the other engages one arm of a bell crank provided on the bridge with its other arm in contact with the other hub engaging adjusting pin.

MAURITZ C. INDAHL. l Vitnesses SAMUEL A. FRASER, SAMUEL R. DAVIS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of IEFaten'rs.

Washington, D. G." 

